488681918 has 4 divisors (see below), whose sum is σ = 733022880. Its totient is φ = 244340958.

The previous prime is 488681917. The next prime is 488681933. The reversal of 488681918 is 819186884.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 488681918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (488681917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122170478 + ... + 122170481.

It is an arithmetic number, because the mean of its divisors is an integer number (183255720).

Almost surely, 2^488681918 is an apocalyptic number.

488681918 is a deficient number, since it is larger than the sum of its proper divisors (244340962).

488681918 is a wasteful number, since it uses less digits than its factorization.

488681918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244340961.

The product of its digits is 884736, while the sum is 53.

The square root of 488681918 is about 22106.1511349217. The cubic root of 488681918 is about 787.6659829184.

The spelling of 488681918 in words is "four hundred eighty-eight million, six hundred eighty-one thousand, nine hundred eighteen".